The Azzurri reported back to the SSC Napoli Training Centre on Tuesday after a few days off.
Billy Gilmour, Scott McTominay and Stanislav Lobotka joined in with the rest of the squad after returning from international duty.
The team are now preparing for their next Serie A match against Cagliari, a 15:00 CEST kick-off at Unipol Domus on Sunday.
